On the other hand, toilet paper takes 40 years to decompose at 14,000 feet, so if you know you'll be stuck in a high place for a while, you might as well bunker up. This slow decomposion is a problem on mountains, where climbers leave their paper trails. See the world's highest junkyard.

But sure, one shouldn't fool the toilet paper industry to believe that the demand for their products is gigantic. They will only cut down more trees, pollute more air and water and build new factories.